CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Retrieve lift coefficient to udf

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   March 10, 2016, 10:58
Default Retrieve lift coefficient to udf
New Member
Join Date: Jan 2016
Posts: 13
Rep Power: 3 is on a distinguished road
Hi ,

I am writing a UDF for FLUENT to input a velocity which is proportional to Cl(lift coeff).Can you please tell me how to retrieve the value of Cl from solver to UDF? is offline   Reply With Quote

Old   March 14, 2016, 15:20
Senior Member
Join Date: May 2010
Posts: 160
Rep Power: 9
duri is on a distinguished road
you can't extract cl directly from fluent. Calculate Fx, Fy and rotate it with angle of attack to get lift and drag force. Then use reference value to get the lift coefficient. I think Fx and Fy are stored in some variable or some direct functions available but not sure which one. If you couldn't figure out direct way to get Fx and Fy. Integrate pressure and wall shear on the face along x and y area vectors.
duri is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Retrieve lift coefficient to udf Main CFD Forum 0 March 9, 2016 06:14
Ansys CFX problem: unexpected very high temperatures in premix laminar combustion faizan_habib7 CFX 4 February 1, 2016 18:00
drag and lift forces in UDF fluent Isitv2A FLUENT 0 June 27, 2014 11:36
Drag and Lift coefficient for diffusor rego STAR-CCM+ 3 May 7, 2012 18:05
Drag coefficient & Lift coefficient?? mehrdadeng CFX 15 December 9, 2009 22:49

All times are GMT -4. The time now is 03:06.